| Term: | Floe |
| Definition: | Any relatively flat piece of sea ice 20 m or more across. Floes are subdivided according to horizontal extent as follows: Giant: Over 10 km across, Vast: 2 to 10 km across, Big: 500 to 2000 m across, Medium: 100 to 500 m across, Small: 20 to 100 m across. |